2003A&A...397..831S

Query : 2003A&A...397..831S

2003A&A...397..831S - Astronomy and Astrophysics, volume 397831-838 (2003/1-3)

Age and metallicity of a globular cluster in the dwarf spheroidal galaxy DDO 78.

SHARINA M.E., SIL'CHENKO O.K. and BURENKOV A.N.

Abstract (from CDS):

We present the results of moderate resolution spectroscopy for a globular cluster in the M81 group dwarf spheroidal galaxy DDO 78. The DDO 78 globular cluster, 4 Milky Way globular clusters, spectroscopic and radial velocity standards were observed with the Long-slit spectrograph of the 6-m telescope (SAO RAS, Russia). Lick spectrophotometric indices were determined in the bandpasses adopted by Burstein et al. (1984ApJ...287..586B). We have derived the mean metallicity of the globular cluster in DDO78 to be [Fe/H]=-1.6±0.1dex by taking the weighted mean of metallicities obtained from the strength of several absorption features. We have estimated an age for the globular cluster of 9-12Gyr similar to that found for the Galactic globular cluster NGC 362, which resembles the DDO 78 cluster in its chemical abundance and integrated spectrophotometric properties.

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Journal keyword(s): galaxies: dwarf - galaxies: star clusters - galaxies: individual: DDO 78

Nomenclature: NAME GC in DDO 78

Simbad objects: 28

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Number of rows : 28
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1167 0
2 Cl Pal 1 GlC 03 33 20.04 +79 34 51.8   17.2       ~ 267 1
3 HD 42979 PM* 06 15 22.1415626952 +35 00 42.792655104   9.70 9.16     F8V 5 0
4 V* HS Aur SB* 06 51 18.4766820936 +47 40 24.176766540   10.85 10.05     G5 93 0
5 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 998 0
6 * 34 Lyn PM* 08 41 01.0699086744 +45 50 02.421127212   6.344 5.359     G8IV 112 0
7 G 115-22 PM* 08 44 05.0087681881 +36 14 43.799478355   11.54   10.6   G0 48 0
8 BD+45 1763 * 09 46 49.7841635904 +45 04 12.470418372   10.36 9.82     F8V 14 0
9 NGC 2976 GiG 09 47 15.458 +67 54 58.97 11.77 11.03 10.16 9.51   ~ 712 1
10 NAME M 81-82 Group GrG 09 55 +69.1           ~ 758 0
11 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
12 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
13 LEDA 28731 G 09 57 02.7 +68 35 30   15.17       ~ 119 1
14 NGC 3077 GiP 10 03 19.0965510921 +68 44 01.556166166 11.23 10.85 10.14 9.74   ~ 808 0
15 DDO 78 G 10 26 27.9 +67 39 24   15.8       ~ 88 1
16 HD 91739 * 10 35 48.1621394832 +13 38 36.286489320   9.87 9.40     G0 11 0
17 Feige 34 HS* 10 39 36.7358839104 +43 06 09.212615280 9.613 10.91 11.14 11.319 11.464 sdOp 731 0
18 HD 96950 * 11 10 39.3852804840 +58 53 36.598903404   10.07 9.04     G8IV 15 0
19 NGC 4147 GlC 12 10 06.149 +18 32 31.78   11.45 10.74     ~ 616 0
20 HD 108847 PM* 12 30 17.6088210696 +30 59 39.713599356   10.05 9.07 8.4   K4V 44 0
21 BD+31 2378 PM* 12 31 38.8940414040 +31 00 59.438238768   10.77 10.00     G5 11 0
22 HZ 44 HS* 13 23 35.2629445608 +36 07 59.544140304 10.186 11.42 11.65 12.00 11.995 sdBN0VIIHe28 439 0
23 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
24 * chi Her PM* 15 52 40.5410491705 +42 27 05.462878877 5.19 5.19 4.62 4.14 3.82 F8VFe-2Hdel-1 532 0
25 HD 152792 PM* 16 53 32.3286092107 +42 49 29.476480157   7.46   6.4   G0V 151 0
26 BD+28 4211 HS* 21 51 11.0221915656 +28 51 50.367627468 8.922 10.25 10.58 10.656 10.831 sdO2VIIIHe5 837 0
27 NAME Local Group GrG ~ ~           ~ 9325 0
28 NAME GC in DDO 78 GlC ~ ~           ~ 1 0

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